exporting questionable statistics

I've just migrated a database from one server to another (8i on HP-UX to 9i on Solaris). I used exp and imp to move the data over.

Now when I exp from the new database I get many warnings about "questionable statistics". I thought that running DBMS_STATS.GATHER_DATABASE_STATS and DBMS_STATS.GATHER_SYSTEM_STATS would update the statistics and stop the error messages. They didn't.

I have two questions:

1. What more do I need to do to update the statistics?
2. Should I have exp'd without statistics in the first place to avoid bringing the "questionable statistics" into the new database?

Thanks for any help you can provide.

-- 
Randy Harris
tech at promail dot com
I'm pretty sure I know everything that I can remember.